Most¶
Status: Stable
documented, exercised by the test suite and/or worked examples, with no known limitations recorded.
Description¶
Most[expr] gives all but the last element of expr.
Examples (4)¶
Every input below was run against the current Mathilda build and its output recorded.
Basic examples (3)¶
In[1]:= First[<|"a" -> 10, "b" -> 20|>] In[1b]:= First[<||>, 0] Out[1b]= 0
In[2]:= Rest[<|"a" -> 10, "b" -> 20, "c" -> 30|>]
Out[2]= <|"b" -> 20, "c" -> 30|>
In[3]:= Take[<|"a" -> 1, "b" -> 2, "c" -> 3|>, 2]
Out[3]= <|"a" -> 1, "b" -> 2|>
Applications (1)¶
Implementation notes¶
Algorithm. builtin_most returns a copy of the input with its last element dropped: it
copies args 0 .. n−2 into a new function node with the same head. Returns NULL (unevaluated)
for atoms or empty expressions.
Attributes: none registered.
References¶
See also: First, Last, Rest, Take, Drop
- Source:
src/part.c - Specification:
docs/spec/builtins/data-structures.md - Tests:
tests/test_association.c - Tests:
tests/test_compiledfunction.c - Tests:
tests/test_eval.c - Tests:
tests/test_ndarray_selection.c
Notes & additional examples¶
Notes¶
Most[expr] drops the last element; it is the complement of Last.